What would we need to know to calculate both work and power? energy, force, and time
force, distance, and time
force, mass, and distance
mass, force, and energy

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

compass can be used day and night, cloudy or sunny